diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index dee4f19..de13a43 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -17,6 +17,3 @@ linters:
     - apk add gcc libc-dev libffi-dev postgresql-dev  # Add texlive
     - pip install tox --no-cache-dir
   script: tox -e linters
-
-  # Be nice to new contributors, but please use `tox`
-  allow_failure: true
diff --git a/apps/api/urls.py b/apps/api/urls.py
index 9bf03c8..aa7e438 100644
--- a/apps/api/urls.py
+++ b/apps/api/urls.py
@@ -1,5 +1,5 @@
 from django.conf import settings
-from django.conf.urls import url, include
+from django.conf.urls import include, url
 from rest_framework import routers
 
 from .viewsets import UserViewSet
diff --git a/apps/logs/apps.py b/apps/logs/apps.py
index 239f86c..7409c20 100644
--- a/apps/logs/apps.py
+++ b/apps/logs/apps.py
@@ -2,7 +2,7 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 
 from django.apps import AppConfig
-from django.db.models.signals import pre_save, post_save, post_delete
+from django.db.models.signals import post_delete, post_save, pre_save
 from django.utils.translation import gettext_lazy as _
 
 
diff --git a/apps/logs/signals.py b/apps/logs/signals.py
index a61b20c..f95e582 100644
--- a/apps/logs/signals.py
+++ b/apps/logs/signals.py
@@ -1,15 +1,13 @@
-# Copyright (C) 2018-2020 by BDE ENS Paris-Saclay
-# SPDX-License-Identifier: GPL-3.0-or-later
+import getpass
+
+from corres2math.middlewares import get_current_authenticated_user, get_current_ip
 from django.contrib.auth.models import User
 from django.contrib.contenttypes.models import ContentType
 from rest_framework.renderers import JSONRenderer
 from rest_framework.serializers import ModelSerializer
-from corres2math.middlewares import get_current_authenticated_user, get_current_ip
 
 from .models import Changelog
 
-import getpass
-
 
 # Ces modèles ne nécessitent pas de logs
 EXCLUDED = [
@@ -59,11 +57,11 @@ def save_object(sender, instance, **kwargs):
         if User.objects.filter(username=username).exists():
             user = User.objects.get(username=username)
 
+    # On n'enregistre pas les connexions
     # noinspection PyProtectedMember
-    if user is not None and instance._meta.label_lower == "auth.user" and previous:
-        # On n'enregistre pas les connexions
-        if instance.last_login != previous.last_login:
-            return
+    if user is not None and instance._meta.label_lower == "auth.user" and previous \
+            and instance.last_login != previous.last_login:
+        return
 
     changed_fields = '__all__'
     if previous:
diff --git a/apps/participation/forms.py b/apps/participation/forms.py
index f49856c..b2ac9d3 100644
--- a/apps/participation/forms.py
+++ b/apps/participation/forms.py
@@ -4,7 +4,7 @@ from django import forms
 from django.core.exceptions import ValidationError
 from django.utils.translation import gettext_lazy as _
 
-from .models import Team, Participation
+from .models import Participation, Team
 
 
 class TeamForm(forms.ModelForm):
diff --git a/apps/participation/views.py b/apps/participation/views.py
index 5b3b513..bb06440 100644
--- a/apps/participation/views.py
+++ b/apps/participation/views.py
@@ -3,9 +3,9 @@ from django.core.exceptions import PermissionDenied
 from django.db import transaction
 from django.urls import reverse_lazy
 from django.utils.translation import gettext_lazy as _
-from django.views.generic import CreateView, FormView, DetailView, RedirectView, UpdateView
+from django.views.generic import CreateView, DetailView, FormView, RedirectView, UpdateView
 
-from .forms import TeamForm, JoinTeamForm, ParticipationForm
+from .forms import JoinTeamForm, ParticipationForm, TeamForm
 from .models import Team
 
 
diff --git a/apps/registration/apps.py b/apps/registration/apps.py
index 56b65e0..3bf6fa5 100644
--- a/apps/registration/apps.py
+++ b/apps/registration/apps.py
@@ -1,5 +1,5 @@
 from django.apps import AppConfig
-from django.db.models.signals import pre_save, post_save
+from django.db.models.signals import post_save, pre_save
 
 
 class RegistrationConfig(AppConfig):
diff --git a/apps/registration/forms.py b/apps/registration/forms.py
index 18ab455..0bcca9b 100644
--- a/apps/registration/forms.py
+++ b/apps/registration/forms.py
@@ -1,9 +1,9 @@
+from django import forms
 from django.contrib.auth.forms import UserCreationForm
 from django.contrib.auth.models import User
-from django import forms
 from django.utils.translation import gettext_lazy as _
 
-from .models import StudentRegistration, CoachRegistration, AdminRegistration
+from .models import AdminRegistration, CoachRegistration, StudentRegistration
 
 
 class SignupForm(UserCreationForm):
diff --git a/apps/registration/models.py b/apps/registration/models.py
index 26f55ad..4ab8d2b 100644
--- a/apps/registration/models.py
+++ b/apps/registration/models.py
@@ -1,3 +1,4 @@
+from corres2math.tokens import email_validation_token
 from django.contrib.sites.models import Site
 from django.db import models
 from django.template import loader
@@ -5,7 +6,6 @@ from django.utils.encoding import force_bytes
 from django.utils.http import urlsafe_base64_encode
 from django.utils.translation import gettext_lazy as _
 from polymorphic.models import PolymorphicModel
-from corres2math.tokens import email_validation_token
 
 
 class Registration(PolymorphicModel):
diff --git a/apps/registration/urls.py b/apps/registration/urls.py
index d2908d0..324dc72 100644
--- a/apps/registration/urls.py
+++ b/apps/registration/urls.py
@@ -1,6 +1,6 @@
 from django.urls import path
 
-from .views import SignupView, UserValidationEmailSentView, UserResendValidationEmailView, UserValidateView
+from .views import SignupView, UserResendValidationEmailView, UserValidateView, UserValidationEmailSentView
 
 app_name = "registration"
 
diff --git a/apps/registration/views.py b/apps/registration/views.py
index 5987fd1..c8fa805 100644
--- a/apps/registration/views.py
+++ b/apps/registration/views.py
@@ -1,16 +1,16 @@
+from corres2math.tokens import email_validation_token
 from django.conf import settings
 from django.contrib.auth.mixins import LoginRequiredMixin
 from django.contrib.auth.models import User
 from django.core.exceptions import ValidationError
 from django.db import transaction
-from django.shortcuts import resolve_url, redirect
+from django.shortcuts import redirect, resolve_url
 from django.urls import reverse_lazy
 from django.utils.http import urlsafe_base64_decode
 from django.utils.translation import gettext_lazy as _
-from django.views.generic import CreateView, TemplateView, DetailView
-from corres2math.tokens import email_validation_token
+from django.views.generic import CreateView, DetailView, TemplateView
 
-from .forms import SignupForm, StudentRegistrationForm, CoachRegistrationForm
+from .forms import CoachRegistrationForm, SignupForm, StudentRegistrationForm
 
 
 class SignupView(CreateView):
diff --git a/tox.ini b/tox.ini
index c0bed5f..cc1c149 100644
--- a/tox.ini
+++ b/tox.ini
@@ -11,7 +11,7 @@ deps =
     -r{toxinidir}/requirements.txt
     coverage
 commands =
-    coverage run --omit='*migrations*,apps/scripts*' --source=apps,note_kfet ./manage.py test apps/
+    coverage run --omit='*migrations*,apps/scripts*' --source=apps,tfjm ./manage.py test apps/
     coverage report -m
 
 [testenv:linters]
@@ -27,7 +27,6 @@ commands =
     flake8 apps/
 
 [flake8]
-ignore = W503, I100, I101
 exclude =
     .tox,
     .git,
@@ -39,7 +38,7 @@ exclude =
     .cache,
     .eggs,
     *migrations*
-max-complexity = 15
+max-complexity = 10
 max-line-length = 160
 import-order-style = google
 application-import-names = flake8